Add more descriptive error message when connecting to contract with wrong provider/signer

[jeff-soriano]

I just think this would help with debugging, as it seems fairly common. Also, the whole provider/signer thing with ethers is a bit of a learning hurdle for me personally, so I think it may help others. As it stands, the error message doesn't help much:

Error: call revert exception (method="manager()", errorSignature=null, errorArgs=[null], reason=null, code=CALL_EXCEPTION, version=abi/5.0.12)

[ricmoo]

Can you provide more context as to what you were doing? It looks like you called a method manager() but the solidity called require with a condition that failed.

[zemse]

When user has testnet and mainnet providers, and switching provider without switching underlying contract address also causes the CALL_EXCEPTION too. I think this is back to the discussion in #1244 (comment). Maybe a debug mode can be introduced which auto activates if development environment env. I understand it's a extra code in the library, but it may be considered a for a rethought since actually I've seen people new to the tech in my offline world as well as online, waste time on this one.

[jeff-soriano]

manager() is a read only function that just returns the address of the person who made the contract. I was following the section in the docs titled "Connecting to a Contract." I was using the default provider when using ethers.Contract, not knowing that I should have been using the original signer instead. Once I used the original signer, everything worked fine

[zemse]

Are you using Hardhat? If yes then the signer is likely corresponding to your local hardhat network.

[jeff-soriano]

Yes I'm using Hardhat. I just think that when a situation like this occurs, when you're trying to call a function and you're not connected to the right provider/signer, that ethers throws a more descriptive message to describe that